Feed-grinding mill



(NQModel.)

A. -S. BAKER. Feed GrindingMill.

\ No. 239,638. Patented April 5,1881..`

N'PETERS. PHDTOAJTMBGRIPNER. WASHINGTON. U. C.

UNITED STATES PATENT OFFICE.

ALLEN S. BAKER, OF EVANSVILLE, ASSIGNOR TO GEORGE AND ALBERT RAYMOND, OF WAUPUN, WISCONSIN. i

yF.EED-CiRlNDING M|LL.

SPECIFICATION forming part of Letters Patent No. 239,638,Vdated April 5, 1881.l

Application filed July 15, 1880. (No model.)

To atl whom 'it may concern:

Beit known that I, ALLEN S. BAKER, of Evansville, in the county of Rock and State of Wisconsin, have inventedacertain new and useful Improvement in Feed-Grin ders, of which the following` is a specification.

The object I have in view is to produce means for eenterin g the burrs of feed-grinders, which will be simple and cheap in construction, can be easily and quickly adjusted, and rigidly locked in place, and will allow the burrs to be 'removed and replaced in position without disturbing the adjustment ofsuch devices; and my invention consists in the peculiar contrivances for accomplishing this object, as fully hereinafter explained, and pointed out by the claims.

`In the accompanying drawings forming a part hereof, Figure l is a top view of the feedgrinder with the burrs in horizontal section;

Fig. 2, an elevation from the inner side ofthe burrs, the frame being sectioned in front of the adjusting-bolts; and Fig. 3. a side elevation ofthe hopper' and the burrs removed from the frame.

Like letters denote corresponding parts in all the gures. K

A is the frame ofthe grinder; B, the drivingshaft, and G the wheel to which the power is applied. The grinder can be double or single; but since the double grinder is simply two sets of burrs mounted in opposite ends of the same frame and run by the same wheel and shaft, the description of the single feed-grinder will serve as well for the double machine.

` To the end of the shaft B is secured, by a set-screw, a plate, D, which carries the screwconveyer E and to which the revolving burr F is securedby bolts a. The heads ofthe bolts a project into the meal-chamber b.

G is the stationary burr, which is Vbolted to the plate H, which is cast in one piece with the hopper I. The arms ofthe frame, between which the burrs are located, are connected by a yoke, K, pressing at its center on the hopper. The yoke is pivoted to one of such arms, and at :its other end is forked, and is held by a thumb-nuage, turning on a swinging bolt, d, pivoted to the other of such arms. A device is provided for locking the thumb-nut in any desired position.

I do not lay claim to any of the devices so far particularly described. however, that the machine should be provided with means for centering the burrs. This I do by the following described novel contrivance.

The hopper-plate H has cast on' each side, on its periphery opposite the center of the plate, two lugs, L M, located one above the other and projecting over the edge ofthe stationary burr G. These lugs form between them grooves, which incluse and slide on the dat heads cf of screw-threaded T-bolts N O. The iiat heads e f serve as ways upon which. the lugs slide. The screw-threaded bolts N O pass through vertical slots P Qin the arms of the frame, and are held therein by nuts gh on both sides of such arms'. The slots P Q are horizontally just large enough to receive the bolts, but vertically they are elongated, so that the vertical position otthe stationary burr can be adjusted by moving the bolts up or down in the slots. By adjusting the bolts lengthwise, the lateral position of the stationary burr can be regulated, while by means of the nuts g h the bolts can be clamped rigidly in the desired position. As usual in this class of machines, the yoke holds the stationary burr inwardly against the revolving burr.

In centering the burrs the clamping-nuts are usually turned back so as to :allow the bolts to play loosely in their` slots. The lugs L M are then slipped over the fiat heads of the ing the adjustment, and when replaced will be correctly centered by the bolts.

I-do not claim, broadly, guides to sustain a grinding-disk which are adjustable both laterally and vertically, beingA aware that such It is essential,Y

guides were made by others prior to the date ary burr, the hopper secured to the stationary of my invention. burr7 a yoke for holding` the stationary burr What I claim as my invention isinwardly, and screw-threaded bolts secured by 15 1. In a feed-grinder, substantially as def nuts in vertical slotsin the frame, and having 5 soribed,theeombination, With avertioal revolvflat heads upon which the stationary burr and ing burr7 of a vertical stationary burr, and hopper slide, substantially as described and screw-threaded bolts secured by nuts in vertishown.

cal slots in the frame, the heads of such bolts ALLEN S. BAKER. forming adjustable Ways upon which the sta- Witnesses: ro tionary burr slides, as set forth. J. H. HOsKINs,

2. In a feed-grinder, the ooinbin ation, with a JOHN F. PHIFER.

Vertical revolving burr7 of a vertical station- 

